Thank you for the ideas. I will try to tackle the water quality problem. I suspect that the water utility may have been added more chemical into the water since the new year. There were snow melting on-and-off in my area after new year. However, my angels and pleco were not affected. Their belly ...

Hi, Folks: Before new year, I bought 10 panda corys from my LFS because of holiday discounts and the availability of a 20 gal tank. The 20 gal tank has 5 small swordtails and 2 one inch flying fox. Within 3 weeks, I only have 3 left now. I tested the water with API Ammonia testing kit. There was no ...